期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 652, 期 -, 页码 185-190出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.08.176
关键词
Bulk metallic glasses; Atomic-scale damage; Relaxation; Electric resistivity
资金
- Research Grant Council (RGC) of the Hong Kong government, through the General Research Fund (GRF) [CityU 117612, CityU 102013]
- Natural Science Foundation of SZU [201439]
The nanoscale Electric Contact Resistance (nanoECR) system with a high resolution is used to study the possible structural change in bulk metallic glasses (BMGs) after stimulation of cyclic stress. It is found that the electrical current traveling through the fatigue-tested Zr50Cu40Al10 BMG specimen is much lower than that of as-cast one at the same electric voltage. Excluding the effect of sample geometry, it is revealed that the increase in the electric resistivity of the fatigue-tested BMG is due to a more disordered structure. Furthermore, our results show pronounced atomic-scale damage and relaxation in the fatigue-tested BMG, shedding quantitative insights into the process of structural evolution in BMGs under cyclic loadings. (C) 2015 Elsevier B.V. All rights reserved.
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